The best way to find out what is to run it. The best way to find out why is to read the documentation of the three commands involved.
–
GillesJan 7 '11 at 18:34

4

Although, if you truly haven't seen the commands before, it might be a better idea to read the documentation first. One does not want to get into the habit of simply running any command they come across.
–
Steven DJan 7 '11 at 20:04

2. The 'date' part

date -u +%W returns the week number. As the last part ("Linux") is a fixed string, the final output depends on which week the command line is run in (the hash is computed on for example "07Linux"). With this knowledge the output can also be computed on Cygwin.

3. An example

The week number for 2012-02-18 is 7 and date -u +%W`uname` returns (has a leading zero, but this is expected for the task at hand)